AEMC instruments MN379 User Manual

AC Current Probe
Model MN379
User Manual
DESCRIPTION
Instruments AC Current Probe Model MN379 (Catalog #2153.01) is the latest
The AEMC
®
in compact AC current probes. Designed to meet the most stringent demands in industry and
electrical contracting, it also meets the latest safety and performance standards. The probe
has a measurement range up to 120 A
of output per amp of measured current, a voltmeter accuracy of 0.5 % or better to take full
advantage of the accuracy of the probe and an input impedance of ≥ 1 MΩ.
WARNING
The safety warnings are provided to ensure the safety of personnel and proper operation of the
instrument. Read the instructions completely.
ƒ Use caution on any circuit: potentially high voltages and currents may be present and may pose a shock
hazard.
ƒ Do not use the probe if damaged. Always connect the current probe to the measuring device before it is
connected around the conductor
ƒ Do not use on non-insulated conductor with a potential to ground greater than 600 V CAT III pollution 2.
Use extreme caution when clamping around bare conductors or bus bars.
ƒ Before each use, inspect the probe; look for cracks in housing or output cable insulation.
ƒ Do not use clamp in wet environment or in locations that hazardous gases exist.
ƒ Do not use the probe anywhere beyond the tactile barrier.
INTERNATIONAL ELECTRICAL SYMBOLS
This symbol signifies that the current probe is protected by double or reinforced
insulation. Use only factory-specified replacement parts when servicing the instrument.
This symbol signifies CAUTION! and requests that the user refer to the user
manual before using the instrument.
This symbol signifies that this is a type A current sensor and that application near
and removal from HAZARDOUS LIVE conductors is permitted.
DEFINITION OF MEASUREMENT CATEGORIES (CAT)
CAT IV: Corresponds to measurements performed at primary electrical
supply (< 1000 V).
Example: primary overcurrent protection devices, ripple control units, and meters.
CAT III: Corresponds to measurements performed in the building installation at the
distribution level.
Example: hardwired equipment in fixed installation and circuit breakers.
CAT II: Corresponds to measurements performed on circuits directly connected to the
electrical distribution system.
Example: measurements on household appliances and portable tools.
RECEIVING YOUR SHIPMENT
Upon receiving your shipment, make sure that the contents are consistent with the packing
list. Notify your distributor of any missing items. If the equipment appears to be damaged,
file a claim immediately with the carrier, and notify your distributor at once, giving a detailed
description of any damage.
, a range and resolution capable of displaying 10mV
RMS